" The theosophy of Light suggests the metaphor of the mirror
and the shadow. But "shadow" must not be taken to imply a
dimension of Satanic darkness, an Ahrimanian antagonist; this
shadow is essentially a reflection, the projection of a silhouette
or face in a mirror. Our authors even speak of a "luminous
shadow" ( in the sense that color is shadow in the context of
absolute Light: Zill al-nur as opposed to Zill al-zulma, dark
shadow). And that is how we must take the following state-
ment: "Everything we call other than God, everything we call
the universe, is related to the Divine Being as the shadow ( or
his reflection in the mirror) to the person. The world is God's
shadow. "

― Henry Corbin , Alone with the Alone: Creative Imagination in the Sufism of Ibn 'Arabi